Chapter
Mar 30, 2017
Effect of Various Warm-Mix Technologies on the Stiffness and Rutting Characteristics of Asphalt Concrete
Authors: A. S. M. Asifur Rahman [email protected], Matias M. Mendez [email protected], and Rafiqul A. Tarefder [email protected]Author Affiliations
Publication: Geotechnical Frontiers 2017
Abstract
Viscoelastic material functions of warm-mix asphalt are not well defined yet for reasons like relatively newer technology in United States and also varies with different technologies. The rutting performances of warm-mix asphalt are also relatively new. This study evaluates the effects of different warm-mix agents on the viscoelastic material functions and rutting performance of asphalt concrete. A control hot-mix asphalt and three warm-mix asphalt mixtures were collected from manufacturing plant with identical aggregate type, size distribution, and binder grade. The loose asphalt-aggregate mixtures are compacted, cored and sawed to cylindrical specimens for dynamic modulus and rutting resistance testing. A numerical method is used to convert complex modulus function to relaxation modulus and creep compliance. In essence, the warm-mix asphalt with water-free chemical agent showed higher stiffness characteristics. However, the warm-mix asphalt with surfactant-based WMA technology is found to be superior in terms of rutting performance, whereas, the warm-mix asphalt with water-free chemical agent is found to be inferior.
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© 2017 American Society of Civil Engineers.
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Published online: Mar 30, 2017
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Ph.D. Candidate, Dept. of Civil Engineering, Univ. of New Mexico, MSC01 1070, 1 University of New Mexico, Albuquerque, NM 87131. E-mail: [email protected]
Research Associate, Roca Engineering, Inc., 3200 NW 38th St., Oklahoma City, OK 73112. E-mail: [email protected]
Professor, Dept. of Civil Engineering, Univ. of New Mexico, MSC01 1070, 1 University of New Mexico, Albuquerque, NM 87131. E-mail: [email protected]
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